Information input help sheet, information processing system using the information input help sheet, print-associated output system using the information input help sheet, and calibration method

ABSTRACT

The technical objective is to provide a simple and low-cost information input help sheet and an information processing system which exhibit a significantly high input accuracy and input efficiency without limiting a mounting object. The information input help sheet comprises an infrared reflection layer which reflects infrared rays from one side and transmits visible light, and a dot pattern layer provided on one side of the infrared reflection layer and on which dots generated by a dot-code generating algorithm and formed with material having an infrared absorbing characteristic are arranged according to a predetermined rule, in order to perform a variety of multimedia information output and/or operation instructions.

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims priority under 35 U.S.C. 119 based upon JapanesePatent Application No. 2007-230776, filed on Aug. 9, 2007. Pursuant to35 U.S.C. 121, this application is also a divisional application of U.S.patent application Ser. No. 12/672,579, filed on Jan. 26, 2011. Theentire disclosures of the aforesaid applications are incorporated hereinby reference.

FIELD OF THE INVENTION

The present invention relates to a sheet printed with a dot pattern andan information processing system using the sheet.

BACKGROUND OF THE INVENTION

In operations of a personal computer, a PDA, a portable terminal, andthe like, input techniques done directly by a fingertip, a touch pen, orthe like on a screen are conventionally known (for example, refer toJapanese Patent Application Publication No. 10-171600).

Such conventional techniques employ a method in which a piezoelectric oroptical touch panel recognizes a coordinate at which a touch pen ismanipulated and the control is informed to a control unit.

However, in the conventional touch panel technologies, parts andmaterials used are costly, and most of such parts and materials areproduced integrally with hardware. Therefore, devices, such as apersonal computer and an ATM, equipped with touch panels become veryexpensive.

To solve such a problem, in some cases, touch panels for beingdetachably mounted on display units have been developed (for example,refer to Japanese Patent Application Publication No. 2001-92595).

[Patent Document 1] Japanese Patent Application Publication No.10-171600

[Patent Document 2] Japanese Patent Application Publication No.2001-97595

SUMMARY OF THE INVENTION

However, touch panels for being mounted on hardware that is already inuse were not available widely and easily, as they were expensive as wellas machine types to be mounted and use conditions were limited. Inaddition, this approach was flawed, since the touch panels detachablymounted on display units were mostly piezoelectric types, reaction toinput through the touch panel was not good enough. Also, as input wasdone by touching the touch panel directly with a finger, the touch panelitself became dirty, degrading recognition performance of the displayunit.

Moreover, conventional detachable touch panels have been proposed onlyfor attaching onto display units. Touch panels of other types such asthe ones used on prints or media have not been proposed.

In this regard, an information input help sheet and informationprocessing system is proposed, which is easy to use and low cost,provides excellent input accuracy and input efficiency, and can beattached to a variety of media.

This information input help sheet is placed, for example, on an existingdisplay screen. If a user touches an icon or the like of normal size,etc by a scanner pen through the information input help sheet,information corresponding to the icon or the like is output.

Moreover, this information input help sheet is used, for example, bycovering an existing print. If a user touches a text or a drawingpattern on the print through the information input help sheet with ascanner pen, information corresponding to the text or drawing pattern isoutput from a display unit, speaker and the like.

With a conventional touch panel, large icons were equipped as the iconswere touched by a finger. Allowable range of precision error wheninputting was wide, and input accuracy of the touch panel was notrequired to be high.

However, with the information input help sheet assumed to be used withexisting screen displays or prints, high input accuracy may be requiredwhen touching displayed images and printed drawing patterns, since theexisting icon displays or print indications are not made inconsideration of instructions by touching, and the indications aresmaller.

The invention is made in consideration of such points, and aims totechnically provides an information input help sheet and informationprocessing system which is easy to use and low cost, provides excellentinput accuracy and input efficiency, and can be attached to a variety ofmedia, and a calibration method for using the information input helpsheet, which can accurately match horizontal and vertical ratios of theinformation input help sheet to the same ratios of a screen or printwith an easy method to realize high input accuracy.

Specifically, a first aspect of the invention is an information inputhelp sheet, disposed on a printed surface of a print or on a displayscreen of a display unit, and on which is provided a dot pattern to beread by an optical reading unit in order to output information relatingto an image of the print or to a display of the display unit, comprisingan infrared reflection layer which has a characteristic to reflectinfrared rays from one side and transmit visible light, and a dotpattern layer provided on the one side of the infrared reflection layerand on which dots generated by a dot-code generating algorithm andformed with material having an infrared, absorbing characteristic arearranged according to a predetermined rule in order to perform a varietyof multimedia information output and/or operation instructions.

According to this, the characteristic, in terms of infrared absorptionand transmission, of a medium surface on which the information inputhelp sheet is placed, does not affect imaging of the dot pattern, sincethe sheet reflects infrared rays irradiated from the infraredirradiation unit. As a result, only the bright and clear dot pattern canbe, imaged, and a dot code can be accurately analyzed. Moreover, easy touse and low cost information input help sheet can be provided.

A second aspect of the invention is the information input help sheetaccording to the first aspect, wherein an infrared diffusion layer thattransmits visible light and diffuses the infrared rays is providedbetween the infrared reflection layer and the dot pattern layer.

According to this, infrared rays can be evenly entered into a lens bydiffusely reflecting the irradiated infrared rays even in a part ofimaging region where an infrared reflection layer prevents theirradiated infrared rays from entering into the lens by specularreflection.

A third aspect of the invention is the information input help sheetaccording, to the first aspect, wherein an infrared diffusion layer thattransmits visible light and diffuses infrared light is provided on oneside of the dot pattern layer.

According to this, an infrared diffusion layer can be provided over adot pattern layer provided on the top surface of an infrared reflectionlayer, or an infrared reflection layer can be provided over a dotpattern layer provided on the rear side of an infrared diffusion layer.Further, the infrared diffusion layer can also function as a simplifiedprotection layer for the dot pattern layer.

A fourth aspect of the invention is an information input help sheet,disposed on a printed surface of a print or on a display screen of adisplay unit, and on which is provided a dot pattern to be read by anoptical reading, unit in order to output information relating to animage of the print or to a display of the display unit, comprising aninfrared diffuse reflection layer that has a characteristic to diffuselyreflect infrared rays from one side and transmit visible light, and adot pattern layer provided on the one side of the infrared diffusereflection layer and on which dots generated by a dot-code generatingalgorithm and formed with material having an infrared absorbingcharacteristic are arranged according to a predetermined rule in orderto cause recognition of a variety of multimedia information outputand/or operation instructions.

According to this, since one layer can diffusely reflect infrared raysto the direction of the incident infrared rays, the information inputhelp sheet can be even slimmer, and the production processes of theinformation input help sheet can be reduced thereby reducing the cost.

A fifth aspect of the invention is the information input help sheetaccording to any one of the first to fourth aspects wherein a protectionlayer that has a characteristic to transmit infrared light and invisiblelight is provided on one side of the dot pattern layer or one side ofthe infrared diffusion layer.

This prevents dots from wearing and dirt, and enables longer use periodof the sheet.

A sixth aspect of the invention is the information input help sheetaccording to any one of the first to fifth aspects, wherein the infraredreflection layer or the infrared diffuse reflection layer further has acharacteristic to reflect infrared rays from the other side.

According to this, the information input help sheet can block infraredrays from a display screen or a screen on which the information inputhelp sheet of the invention is attached, and allows the infrared lightirradiated from the infrared irradiation unit to be the only irradiationlight. As a result, only bright and clear dot pattern can be imaged, andthe dot code can be accurately analyzed.

A seventh aspect of the invention is an information input help sheet,disposed on a printed surface of a print or on a display screen of adisplay unit, and on which is provided a dot pattern to be read by anoptical reading unit in order to output information relating to an imageof the print or to a display of the display unit, comprising, aninfrared reflection layer that has a characteristic to reflect infraredrays from each side to a respective direction and transmit visiblelight, and a dot pattern layer provided on both sides of the infraredreflection layer and on which dots generated by a dot-code generatingalgorithm and formed with material having an infrared absorbingcharacteristic are arranged according to a predetermined rule in orderto cause recognition of a variety of multimedia information output andor operation instructions.

According to this, since it is possible to use both sides of theinformation input help sheet, both front and rear sides can be usedwithout distinguishing therebetween, which enhances convenience forusers.

An eighth aspect of the invention is the information input help sheetaccording to the seventh aspect, wherein an infrared diffusion layerthat transmits visible light and diffuses infrared light from respectivedirection is provided between the infrared reflection layer and the dotpattern layer on each side.

According to this, infrared rays can be evenly entered into a lens bydiffusely reflecting the irradiated infrared rays even in a part ofimaging region where an infrared reflection layer prevents theirradiated infrared rays from entering into the lens by specularreflection.

A ninth aspect of the invention is the information input help sheetaccording, to the seventh aspect, wherein an infrared diffusion layerthat transmits visible light and diffuses infrared light from respectivedirection is provided on a further external surface of the each side ofthe dot pattern layer.

According to this, an infrared diffusion layer can be provided over adot pattern layer provided on the top surface of an infrared reflectionlayer, or an infrared reflection layer can be provided over a dotpattern layer provided on the rear side of an infrared diffusion layer.Further, the infrared diffusion layer and the infrared reflection layercan also function as simplified protection layers for the dot patternlayer.

A tenth aspect of the invention is an information input help sheet,disposed on a printed surface of a print or on a display screen of adisplay unit, and on which is provided a dot pattern to be read by anoptical reading unit in order to output information relating to an imageof the print or to a display of the display unit, comprising an infrareddiffuse reflection layer that has a characteristic to diffusely reflectinfrared rays from each side and transmit visible light, and a dotpattern layer provided on both sides of the infrared diffuse reflectionlayer and on which dots generated by a dot-code generating algorithm andformed with material having an infrared absorbing characteristic arearranged according to a predetermined rule in order to cause recognitionof a variety of multimedia information output and/or operationinstructions.

According to this, since one layer can diffusely reflect infrared raysto the direction of incident infrared rays, the information input helpsheet can be even slimmer, and the production processes of theinformation input help sheet can be reduced thereby reducing the cost.

An eleventh aspect of the invention is the information input help sheetaccording to any one of seventh to tenth aspects, wherein a protectionlayer that has a characteristic to transmit infrared light and visiblelight from respective directions is provided on a further externalsurface of the dot pattern layer on each side or a further externalsurface of the infrared diffusion layer.

This prevents dots from wearing and dirt, and enables longer use periodof sheet.

A twelfth aspect of the invention is the information input help sheetaccording to any one of seventh to eleventh aspects, wherein the dotpattern is made into a pattern with a coordinate value and/or a codevalue different between one side and the other side of an infraredreflection layer.

According to this, one information input help sheet can be used for twodifferent kinds of purposes, which enhances convenience and flexibility.

A thirteenth aspect of the invention is the information input help sheetaccording to any one of the first to twelfth aspects, wherein the dotpattern layer or other layers are superimposed and printed with a text,an illustration, a photograph, or the like with material transmittinginfrared rays or material reflecting infrared rays.

According to this, since, icons and drawing patterns, etc., such as anoperation button, can be superimposed and printed with a dot pattern ofthe information input help sheet, a fixed variety of multimediainformation output and/or operation instructions can be clearlyexpressed, which allows to widen use purposes and enhance convenience.

A fourteenth aspect of the invention is the information input help sheetaccording to any one of the first to thirteenth aspects, wherein anadhesion layer is provided on a side not facing the dot pattern layer ofthe infrared reflection layer or a side not facing the dot pattern layerof the infrared diffuse reflection layer.

According to this, it is possible to easily attach the information inputhelp sheet on a display unit, etc.

A fifteenth aspect of the invention is the information input help sheetaccording to any one of the first to fourteenth aspects, wherein the dotpattern is made into a pattern with an XY coordinate value and/or a codevalue based on a predetermined algorithm.

According to this, it is possible to easily output a variety ofmultimedia information, as well as read coordinate information and/orcode information of the position touched by the scanner, recognize thetouch position, and perform the corresponding operation instruction.

A sixteenth aspect of the invention is an information processing systemusing, the information input help sheet according to any one of thefirst to fifteenth aspects, wherein the information input help sheet isprovided on a display screen of a display unit of an informationprocessing device, and the information processing system enablestouch-panel style input by reading an dot pattern on the informationinput help sheet by a dot-pattern reading unit and secondarily inputsinto the information processing device based on the dot pattern read outby the dot-pattern reading unit.

According to this, a function as a touch panel can be provided only byattaching the information input help sheet on which a dot pattern isformed to the display screen of a display unit and touching the sheet bya dot-pattern reading unit, which realizes an simplified and low-costinformation processing system.

A seventeenth aspect of the invention is a system for outputtingcontent-related information using the information input help sheetaccording to any one of the first to fifteenth aspects, wherein theinformation input help sheet is provided, in an information processingdevice, on a display screen of a display unit displaying contentrepresented by a text, an illustration, a photograph and the like, thesystem enables touch-panel style input by reading an XY coordinate valueand/or a code value of a dot pattern on the information input help sheetby a dot-pattern reading unit and converting into an xy coordinate informat information of the content displayed on the display unit,recognizes content-specific information of a position touched by thedot-pattern reading unit, and searches and outputs content-relatedinformation relating to the content-specific information

According to this, a text, an illustration, a photograph, and the likeon a display unit can be specified and the detailed description thereofcan be displayed on the screen just by placing the information inputhelp sheet on the display unit and touching the sheet with thedot-pattern reading unit. Therefore, relevant information can beaccessed even for a text, an illustration, a photograph, an address, orthe like for which a link is not set on a Web site or the like, therebyenhancing convenience for users. It should be noted thatcontent-specific information may be instruction of operation.

An eighteenth aspect of the invention is an information processingsystem using the information input help sheet according to sixteen orseventeen aspect, wherein the information processing device is apersonal computer, a PDA, a television receiving set, a front or rearprojector, a game machine, a karaoke machine, a mobile phone terminal, aPOS terminal, an ATM, a KIOSK terminal, a car navigation system, apachinko, a watch, or a smart phone, and the information processingdevice is disposed, as a touch-panel style input device, on a displayscreen of a display unit or a screen.

According to this, the information processing system using theinformation input help sheet may be used for any device having a displayunit or a screen.

A nineteenth aspect of the invention is a system for outputtingprint-related information using the information input help sheetaccording to any one of the first to fifteenth aspects, wherein theinformation input help sheet is used to cover a print surface of aprint, and the system recognizes print information by reading a dotpattern on the information input help sheet with a dot-pattern readingunit and converting a recognized XY coordinate on the print surface andprint-specific information identifying the print into an xy coordinatein the print information, and searches and outputs information relatingto the print information.

According to this, it is possible, without directly printing a dotpattern on a print including a book, a magazine, and newspapers, torecognize a text, an illustration, and a photograph, indicated at thetouched position on the print by touching and reading the XY coordinatevalue of the information input help sheet with a dot-pattern readingunit and converting the XY coordinate value into an xy coordinate valuein a specified print information (for example, a DTP file) and search avariety of multimedia information, such as sound information and imageinformation, corresponding to the recognized print information from anelectronic dictionary or database where corresponding multimediainformation is set in advance, and automatically output relevantinformation. Moreover, if a mask which specifies print information, suchas a text, an illustration, and a photograph, as an XY coordinate valueand multimedia information corresponding to the mask number are set inadvance, the XY coordinate value in the dot pattern of the informationinput help sheet read by the dot-pattern reading unit can be used tosearch a multimedia information file and output relevant information. Itshould be noted that the recognized print information may be instructionof operation.

A twentieth aspect of the invention is a system for outputtingprint-related information using the information input help sheetaccording to the nineteenth aspect, wherein the information input helpsheet is used to cover a print surface of a print, and an icon forinputting an index specifying the print surface of the print with thedot-pattern reading unit are superimposed and printed with a dotpattern.

According to this, as a user can use a dot-pattern reading unit to inputinformation, such as the page number of a print, input of an indexspecifying the page number using a keyboard and the like is notrequired, which allows the system to be used more generally and toprovide highly convenient and easy to use system.

It should be noted that the icon refers to are ion for causingrecognition of a specific meaning with a text, an illustration or asymbol in a graphic such as a rectangular and a round.

A twenty-first aspect of the invention is the information processingsystem using the information input help sheet according to any one ofthe first to fifteenth aspects, wherein the information input help sheetis a medium processed into a sticker shape, a card shape, a bookmarkshape, or a sticky note shape, and the system performs a variety ofmultimedia information output and/or operation instructions by reading adot pattern on the medium by a dot-pattern reading unit.

According to this, it is possible to provide a system with excellentconvenience and flexibility by processing the information input helpsheet into a variety of forms.

A twenty-second aspect of the invention is the information input helpsheet according to any one of the first to fifteenth aspects, whereinthe information input help sheet is processed into a sticker shape, acard shape, a bookmark shape or a sticky note shape, which is used toperform a variety of multimedia information output and or operationinstructions by reading a dot pattern on the medium by a dot-patternreading unit.

According to this, it is possible to provide a system with excellentconvenience and flexibility by processing the information input helpsheet into a variety of forms.

A twenty-third of the invention is the information processing systemusing the information input help sheet according to any one of the firstto fifteenth aspects, wherein the information input help sheet isdisposed on display screens of a plurality of display units connected toone or more than one information processing devices, and the systemenables touch-panel style input by reading a dot pattern on theinformation input help sheet disposed on the display screen on thedisplay unit by a dot-pattern reading unit and secondarily inputs intothe information processing device based on the dot pattern read out bythe dot-pattern reading unit.

According to this, a thin client system can be provided using theinformation input help sheet. As for a plurality of displays to which amovie and an image are delivered from a server, a low cost input andoutput terminal which allows touch-panel style input can be realized byattaching the information input help sheet on a general televisionmonitor or screen not incorporating a central processing unit. As aresult, low cost and thin client style information processing system canbe built.

A twenty-fourth aspect of the invention is the information processingsystem according to the twenty-third aspect, wherein connections betweenthe information processing device and the plurality of display units aremade by wired or wireless methods.

According to this, it is possible to choose whether a low-cost wiredmethod or a convenient wireless method depending on the installationenvironment.

A twenty-fifth aspect of the invention is the information processingsystem according to the twenty-third or twenty-fourth aspect, wherein aconnection between the information processing device and the dot-patternreading unit is made by a wired or wireless method.

According to this, it is possible to choose whether a low-cost wiredmethod or a convenient wireless method depending on the installationenvironment.

A twenty-sixth aspect of the invention is the information processingsystem according to any one of the twenty-third to twenty-fifth aspects,wherein the information input help sheet is printed with an XYcoordinate value as well as a cord value that identifies each displayunit as a dot pattern, the code value and XY coordinate value read outby a dot-pattern reading unit are transmitted to the informationprocessing device in order to cause recognition of which display unitthe values refer to and to enable touch-panel style input, and theinformation processing device recognizes a variety of multimediainformation output and/or operation instructions corresponding to eachdisplay unit and displays output information on the display unit.

According to this, as the dot pattern includes a dot pattern of acombination of a coordinate value and a code value printed thereon,identifying a display and touch-panel style input processing can besimultaneously performed.

A twenty-seventh aspect of the invention is the information processingsystem according to any one of the twenty-third to twenty-fifth aspects,wherein the information input help sheet is printed with an XYcoordinate that uniquely identifies a display unit, the XY coordinatevalue read out by a dot-pattern reading unit is transmitted to theinformation processing unit in order to cause identification of thedisplay and to enable touch-panel style input, and the informationprocessing device recognizes a variety of multimedia information outputand/or operation instructions corresponding to each display unit anddisplays output information on the display unit.

According to this, as an information input help sheet on which isprinted a dot pattern with a different XY coordinate value is placed oneach display unit, the display unit can be identified only by the XYcoordinate value.

A twenty-eighth aspect of the invention is the information processingsystem according to any one of the twenty-third to twenty-fifth aspects,wherein a sticker printed with a dot pattern of a code value thatidentifies each display unit is attached on a chassis of the displayunit, the code value read out by a dot-pattern reading unit istransmitted to the information processing device in order to causerecognition of which display unit the value refers to and to enabletouch-panel style input, and the information processing devicerecognizes a variety of multimedia information output and/or operationinstructions corresponding to each display unit and displays outputinformation on the display unit.

According to this, as a sticker identifies a display unit, the displayunit can be identified using the same information input help sheet.

It should be noted that the sticker printed with a dot pattern may beprinted on anywhere including an information input help sheet or adisplay chassis.

A twenty-ninth aspect of the invention is a calibration method for usingan information input help sheet that is disposed on a print surface ofas print or a display screen of a display unit, and on which is provideda dot pattern to be read by an optical reading unit in order to outputinformation relating to an image of the print or a display of thedisplay unit, wherein the information input help sheet is used by beingdisposed on the display screen of the display unit, a calibration markis provided on two or more corners and/or a center of one side of theinformation input help sheet, and a coordinate system of the displayunit and a coordinate system of the information input help sheet areproperly related by moving and adjusting a cursor to the mark.

According to this, it is possible to perform an accurate calibration inthe resolution of a display unit, by moving and adjusting a cursor tothe mark disposed on the information input help sheet, which thereafterprevents coordinate misalignment between input by a dot-pattern readingunit onto the information input help sheet and processing to the imageon the display unit.

A thirtieth aspect of the invention is the calibration method accordingto the twenty-ninth aspect, wherein the calibration mark is formed on adetachable transparent sticker, and the sticker is peeled off from theinformation input help sheet after the calibration is completed.

According to this, the calibration marks on the information input helpsheet can be removed after the calibration, which can prevent fromimpairing the screen display of the display unit.

A thirty-first aspect of the invention is the calibration methodaccording to the twenty-ninth aspect, wherein the calibration mark isprovided on the information input help sheet in a state in which themark is removable, and the mark is removed from the information inputhelp sheet after the calibration is completed.

A thirty-second aspect of the invention is the information input helpsheet used in the calibration according to any one of the twenty-ninthto thirty-first aspects.

A thirty-third aspect of the invention is a calibration method for usingan information input help sheet that is disposed on a prim surface of aprint or a display screen of a display unit, and on which is provided adot pattern to be read by an optical reading unit in order to outputinformation relating to an image of the print or a display of thedisplay unit, wherein the information input help sheet is used by beingdisposed on the display screen of the display unit, a calibration markis displayed at least temporally on two or more corners and/or a centerof the display unit, and calibration is performed to properly relate acoordinate system of the display unit and a coordinate system of theinformation input help sheet by adjusting the dot-pattern reading unitto the mark and reading the dot pattern on the information input helpsheet.

According to this, the information input help sheet is not required tobe printed with a calibration mark, which enables easier calibration.

A thirty-fourth aspect of the invention is a calibration method forusing an information input help sheet that is disposed on a printsurface of a print or a display screen of a display unit, and on whichis provided a dot pattern to be read by an optical reading unit in orderto output information relating to an image of the print or a display ofthe display unit, wherein the information input help sheet is used tocover the print surface of the print, a calibration mark is printed ontwo or more corners of the information input help sheet and the print,and a coordinate system of the print and a coordinate system of theinformation input help sheet are properly related by adjusting thecalibration marks of both of the information input help sheet and theprint.

According to this, calibration may be done easily by human eyes toprevent, thereafter, coordinate misalignment between input by a scanneronto the information input help sheet and processing to an image on aprint.

A thirty-fifth aspect of the invention is the information input helpsheet used for the calibration according to the thirty-fourth aspect.

A thirty-sixth aspect of the invention is a calibration method for usingan information input help sheet that is disposed on a print surface of aprint or a display screen of a display unit, and on which is provided adot pattern to be read by an optical reading unit in order to outputinformation relating to an image of the print or a display of thedisplay unit, wherein the information input help sheet is used to coverthe print surface of the print, a calibration mark is printed on two ormore corners of the print, and a coordinate system of the print and acoordinate system of the information input help sheet are properlyrelated by adjusting the dot-pattern reading unit to the mark andreading the dot pattern on the information input help sheet.

According to this, since calibration marks only need to be printed on aprint and are not required to be printed on the information input helpsheet, the information input help sheet may be versatile.

According to this, a device equipped with any display unit including ageneral computer, a PDA, and a mobile phone may be very easily used astouch-panel style input means.

Further, the information input help sheet can be mounted on a print,such as a book and a catalog, or any other media, which enablesoutputting of multimedia information including a text, an illustration,a photograph, a sound, and a movie relating to a part of a medium andperforming of operation, without printing any code on the medium itself.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a drawing using a grid sheet of the invention (informationinput help sheet) in a general computer system as an informationprocessing device.

FIGS. 2A and 2B are sectional views (1) illustrating diffuse reflection.

FIGS. 3A and 3B are sectional views (2) illustrating diffuse reflection.

FIGS. 4A to 4G are sectional views showing a variety of grid sheetstructures.

FIGS. 5A to 5F are sectional views showing structures of grid sheetswith dot pattern layers provided on both sides.

FIG. 6 is an explanatory diagram showing an example of a dot pattern ofGRID1.

FIGS. 7A and 7B are enlarged views showing an example of an informationdot of a dot pattern in GRID1.

FIG. 8 is an explanatory diagram showing a dot pattern format in GRID1.

FIG. 9 is an example of an information dot in GRIM and bit expression ofdata defined therein, showing another embodiment.

FIGS. 10A to 10C are an example of an information dot in GRID1 and bitexpression of data defined therein; FIG. 10A arranges two dots; FIG. 10Barranges four dots; and FIG. 10C arranges five dots.

FIGS. 11A to 11D show modification examples of a dot pattern in GRID1;FIG. 11A is a schematic diagram of six information dot arrangement; FIG.11B is a schematic diagram of nine information dot arrangement; and FIG.11C is a schematic diagram of 12 information dot arrangement; and FIG.11D is a schematic diagram of 36 information dot arrangement.

FIGS. 12A to 12C are explanatory diagrams showing dot patterns ofdirection dot.

FIGS. 13A and 13B are diagrams showing an illustrative example using agrid sheet, having a dot pattern layer only on one side, with a print.

FIGS. 14A and 14B are a front view and a sectional view of a grid sheetused in FIGS. 13A and 13B.

FIGS. 15A and 15B are diagrams showing an illustrative example of usinga grid sheet having dot pattern layers on both sides for a print.

FIGS. 16A to 16C are front views and a sectional view of a grid sheetused in FIGS. 15A and 15B.

FIGS. 17A to 17C are diagrams showing a system for displayinginformation on a display unit by touching on a grid sheet by a user.

FIG. 18 is a diagram showing another embodiment of a system fordisplaying information on a display unit by touching a sheet by a user.

FIG. 19 is an explanatory diagram showing an embodiment where a gridsheet is attached on a display unit, content-specific informationtouched by a scanner is recognized, and relevant information isautomatically searched and output.

FIG. 20 is a sectional view of a grid sheet used by being attached on adisplay unit.

FIG. 21 is a diagram showing a case where a grid sheet is used withprojector system.

FIG. 22 is a diagram showing a case where a grid sheet is used with arear projector system.

FIG. 23A is a diagram showing a case where a grid sheet is used with amobile terminal, and FIG. 23B is a diagram showing a case where a gridsheet is used with a car navigation system.

FIG. 24 is a block diagram of a thin client system using a grid sheet.

FIG. 25 is a diagram showing an example of a display unit and a stickerused in a thin client system.

FIGS. 26A to 26C are diagrams illustrating a calibration method to adisplay unit, and a grid sheet used in the calibration.

FIGS. 27A to 27C are diagrams illustrating another embodiment ofcalibration method to a display unit.

FIGS. 28A and 28B are diagrams illustrating a calibration method to aprint and a grid sheet used in the calibration.

FIGS. 29A and 29B are diagrams illustrating another embodiment of acalibration method to a print.

DESCRIPTION OF NUMERALS AND SIGNS

-   DOT PATTERN-   KEY DOT-   INFORMATION DOT-   REFERENCE GRID POINT DOT-   VIRTUAL GRID POINT-   48 a, 48 b, 48 c, 48 d, 48 e REFERENCE DOT-   48 f, 48 g. 48 h VIRTUAL REFERENCE POINT

DETAILED DESCRIPTION OF THE INVENTION

FIGS. 1 to 2B are explanatory diagrams showing an embodiment of a gridsheet as the information input help sheet of the invention used by beingattached on a display unit.

FIG. 1 is a diagram in which a grid sheet is used with a generalcomputer system of an information processing device. In this embodiment,the grid sheet is attached on a display screen such as a liquid crystaldisplay (LCD) or CRT (cathode ray tube) of a personal computer or thelike. The grid sheet is formed as a transparent film and printed with adot pattern. This dot pattern, although the details are described later,is made into a pattern with an XY coordinate value and/or a code valuebased on a predetermined algorithm. A scanner as a dot-pattern readingunit is connected to the computer body. A user touches a grid sheet withthe scanner in accordance with the instruction on the screen seenthrough the grid sheet. The scanner reads the dot pattern and transmitsthe information to a personal computer through a USB cable; the centralprocessing unit (CPU) of the personal computer analyzes a dot pattern,calculates an XY coordinate value on the grid sheet, and furtherconverts the coordinate value to an xy coordinates value on the displayunit. As a result a touch panel style input using the coordinate valueinformation is made possible.

According to this, this sheet makes possible the touch-panel styleinput, which can provide low cost and highly convenient touch panel.Also, even information for which link information is not set, can bereferred to by searching relevant information, while browsing anInternet site.

It should be noted that, although a personal computer is used as aninformation processing unit in FIG. 1, the invention is not limited tothis the information processing unit may be a personal computer, a PDA,a television receiver, a front or rear projector, a game machine, akaraoke device, a mobile phone terminal, a PUS terminal, an ATM, a KIOSKterminal, a car navigation system, a pachinko, a watch, a smart phone,or the like. For such devices, a grid sheet as a touch panel style inputdevice is disposed on the display screen of a display unit or a screen.

FIGS. 2A and 2B are sectional views showing the internal structure ofthe grid sheet described in FIG. 1.

FIG. 2A is a longitudinal sectional view showing a state where a gridsheet is touched by a scanner.

As shown in FIG. 2A, the grid sheet has a layered structure where aninfrared reflection layer, a dot pattern layer, a transparent sheet forprotection (a protection layer) are layered in the order from thedisplay unit side.

The infrared reflection layer has a structure where a transparentevaporation sheet made from material that transmits visible light, suchas vinyl, polyvinyl chloride, polyethylene terephthalate, andpolypropylene, is deposited with infrared reflecting material. Theinfrared reflection layer reflects, to the scanner, infrared rays thatwas irradiated from the infrared irradiation unit of a scanner andtransmitted through the transparent sheet for protection, as well astransmits visible light. At the same time, the infrared reflection layerblocks infrared rays from the display unit. In this way, as infraredlight irradiated from the infrared irradiation unit of the scanner canbe the only irradiation light, only a bright and clear dot pattern canbe imaged and the dot code can be accurately analyzed.

The dot pattern layer is printed with a dot pattern where dots made frommaterial having an infrared absorbing characteristic, such as carbonink, are arranged in accordance with a predetermined rule that isdescribed later.

The transparent sheet for protection is made from material whichtransmits visible light and infrared rays, such as vinyl, polyvinylchloride, polyethylene terephthalate, and polypropylene. If a dotpattern is repeatedly touched by a scanner, the dots are worn away, anda problem occur such that the dot pattern cannot be accurately read. Byproviding a transparent sheet for protection, the dots are preventedfrom wearing and dirt, and the sheet can have a longer use period.

The scanner is embedded with an IR-LED as an infrared irradiation unit,an IR filter for blocking a predetermined wave-length component of thereflection light, a C-MOS sensor as an imaging element, and a lens. Thescanner captures reflection light of the irradiation light irradiated ona grid sheet. As described above, as the dot pattern is printed with inkhaving an infrared absorbing characteristic, only dot part is imaged asblack in the image captured by the C-MOS sensor.

As it is, the reflection layer that was specular-reflected from theinfrared reflection layer does not enter into the lens and is imaged asblack in the middle, as shown in FIG. 2B. As a result, the whole dotpattern cannot be imaged completely, and, thus, the infrared rays shouldbe diffusely reflected before entered into the lens. That is, as shownin FIG. 3A, an infrared diffusion layer should be provided between thedot pattern printed layer and the infrared reflection layer. Thisinfrared diffusion layer is made from transparent or translucentmaterial. In this way, as shown in FIG. 3B, infrared rays irradiatedfrom the IR-LED is specular-reflected from the infrared reflection layerand diffused by the infrared diffusion layer, and reflected light fromthe whole imaging area enters into the lens.

It should be noted that, although, in FIGS. 3A and 3B, an infrareddiffusion layer is provided, on a grid sheet, the invention is notlimited to this, and a filter made from infrared diffusing material maybe provided on the imaging opening of the scanner.

FIGS. 4A to 4G are sectional views showing a variety of grid sheetstructures.

FIG. 4A is a grid sheet composed of an infrared reflection layer thathas a characteristic to reflect infrared rays and transmit visible lightand a dot pattern layer. As shown in FIG. 4A, infrared rays irradiatedfrom the infrared irradiation unit are absorbed into a part where dotsof the dot pattern layer are formed (hereafter, referred to as dotpart), but are transmitted through other regions. Then, the transmittedinfrared rays are specular-reflected from the infrared reflection layerand transmitted through the dot pattern layer other than the dot part.

FIG. 4B is a grid sheet provided, between an infrared reflection layerand a dot pattern layer, with an infrared diffusion layer that transmitsvisible light as well as diffuses the infrared rays. As shown in FIG.4B, the infrared rays irradiated from the infrared irradiation unit areabsorbed in the dot part of the dot pattern layer, and transmittedthrough other regions. Then, the transmitted infrared rays are diffusedby the infrared diffusion layer, specular-reflected by the infraredreflection layer, again, diffused by the infrared diffusion layer, andtransmitted through the dot pattern layer other than the dot part.

FIG. 4C is a grid sheet provided, on one side of a dot pattern layer,that is, the opposite side of an infrared reflection layer, with aninfrared diffusion layer that transmits visible light as well asdiffuses infrared light. As shown in FIG. 4C, infrared rays irradiatedfrom the infrared irradiation unit are diffused by the infrareddiffusion layer, absorbed in the dot part of the dot pattern layer, andtransmitted through other regions. Then, transmitted infrared rays arespecular-reflected by the infrared reflection layer, again, transmittedthrough the dot pattern layer other than the dot part, and diffused bythe infrared diffusion layer.

FIG. 4D is a grid sheet composed of a dot pattern layer and an infrareddiffuse reflection layer that has a characteristic to diffusely reflectinfrared rays from one side and transmit visible light. As shown in FIG.4D, infrared rays irradiated from the infrared irradiation unit are,first, absorbed in the dot part of the dot pattern layer and transmittedthrough other regions. Then, the transmitted infrared rays arediffuse-reflected by the infrared diffuse reflection layer, andtransmitted through the dot pattern layer other than the dot part.

FIG. 4E is a grid sheet provided with a protection layer that has acharacteristic to transmit infrared tight and visible light on theexternal surface of the dot pattern layer side of the grid sheet shownin FIG. 4A. Having such a protection layer, the dots are prevented fromwearing and dirt and the sheet can have a longer use period.

It should be noted that the protection layer may be provided on theexternal surface of the dot pattern layer side of the grid sheet shownin FIGS. 4B to 4D.

FIG. 4F is a grid sheet which also has a characteristic to reflectinfrared rays from the opposite side of the dot pattern layer in thegrid sheet shown in FIG. 4A. Having such a characteristic, infrared raysfrom a display screen or a screen on which the and sheet of theinvention is attached can be blocked and infrared light irradiated fromthe infrared irradiation unit can be the only irradiation light. Thus,only bright and clear dot pattern can be imaged and the dot code can beaccurately analyzed.

It should be noted that, the grid sheets, not only the one in FIG. 4Abut also the ones shown in FIGS. 4B to 4E, may have a characteristic toreflect infrared rays from the opposite side of (the surface other than)the dot pattern layer.

FIG. 4G is a grid sheet provided with an adhesive layer on a side notfacing the dot pattern layer of the infrared reflection layer in thegrid sheet shown in FIG. 4A. The adhesive layer is made from materialwhich makes the layer detachable. The adhesive layer is required onlywhen the grid sheet is used by being attached on a display unit or amedium, and not required when, as described later, used by being placedon or sandwiched by a print. Having such an adhesive layer, the gridsheet can be easily attached on a display unit, etc.

It should be noted that the adhesive layer may be provided on a side notfacing the dot pattern layer of the infrared reflection layer of thegrid sheet, not only in the grid sheet in FIG. 4A but also the onesshown in FIGS. 4B to 4E.

FIGS. 5A to 5F show another embodiment of the grid sheet. Thisembodiment features the dot pattern layers provided both sides of asheet.

FIG. 5A is a grid sheet composed of an infrared reflection layer thathas a characteristic to reflect infrared rays irradiated on each surfaceto each direction and transmit visible light and a dot pattern layerprovided on both sides of the infrared reflection layer. According tothis, both sides of the sheet can be used, enhancing convenience.

FIG. 5B is a grid sheet provided with an infrared diffusion layer,between an infrared layer and a dot pattern layer on each side, thattransmits visible light and diffuses infrared light from each direction.

FIG. 5C is a grid sheet provided with an infrared reflection layer andan infrared diffusion layer on an external surface of the dot patternlayer of each side of the infrared reflection layer.

FIG. 5D is a grid sheet composed of an infrared diffuse reflection layerand dot pattern layers provided on both sides of the infrared diffusereflection layer.

FIG. 5E is an information input help sheet where both external sides ofa grid sheet shown in FIG. 5A are provided with protection layers havinga characteristic to transmit infrared, light and visible light from eachdirection.

It should be noted that the protection layer may be provided not only onthe both external sides of a grid sheet in FIG. 5A but also on the bothexternal sides of the ones shown in FIGS. 5B to 5D.

FIG. 5F is a grid sheet 5A where, in a grid sheet shown in FIG. 5A,adhesive layers are provided on each side not facing the dot patternlayer of the infrared reflection layer, that is, on both external sidesof the grid sheet.

It should be noted that the adhesive layer may be provided not only onboth external sides of the grid sheet in FIG. 5A but also on bothexternal sides of the ones shown in FIGS. 5B to 5E.

Descriptions on each layer and reflection of grid sheets in FIGS. 5A to5F are the same as described above, so the descriptions are omittedhere.

It should be noted that, in grid sheets shown in FIGS. 5A to 5F,different coordinate values and/or code values may be made into patternsbetween a do pattern layer on one side and a dot-pattern layer on theother side of the infrared reflection layer or infrared diffusereflection layer.

Also, in grid sheets shown in FIGS. 4A to 5F, a text, an illustration, aphotograph, or the like may be superimposed and printed on the dotpattern layer or other layers, with ink of infrared transmittingmaterial or infrared reflecting material.

<Description of a Dot Pattern>

Dot patterns printed on such an information input help sheet are nowdescribed with reference to FIGS. 6 to 12C.

<Description of a Dot Pattern GRID1>

FIGS. 6 to 11D are explanatory diagrams showing GRID1 as an example of adot pattern of the invention.

It should be noted that in these diagrams, grid lines in horizontal andvertical directions are added for convenience of description, and do notexist in an actual printing surface. If a scanner as an imaging unit hasan infrared irradiation means, a key dot 2, an information dot 3, areference grid point dot 4 and the like constituting a dot pattern 1,are preferably pouted with an invisible ink or a carbon ink, whichabsorbs the infrared light.

FIG. 6 is an enlarged view showing an example of information dots of adot pattern and bit expression of data defined therein. FIGS. 7A and 7Bare explanatory diagrams showing information dots arranged with key dotslocated in the centers.

The information input and output method using a dot pattern of thepresent invention comprises means for generating a dot pattern 1, meansfor recognizing the dot pattern 1, and means for outputting informationand a program from the dot pattern 1. That is, after retrieving a dotpattern 1 as image data with a camera, first, the method extracts areference grid point dot 4, then, extracts a key dot 2 based on the factthat there is no dot at the location where a reference grid point dot 4supposed to be, extracts an information dot 3, digitizes the informationdot 3 to extract an information region, converts the information intonumerical values, and outputs information and a program from this dotpattern 1 based on the numerical information. For example, the methodoutputs information such as a sound and a program from this dot pattern1 to an information output device, a personal computer, a PDA, a mobilephone, or the like.

To generate a dot pattern 1 of the present invention, based on a dotcode generation algorithm, fine dots, used for recognition of numericalinformation, including key dots 2, information dots 3, and referencegrid point dots 4, are arranged in accordance with a predetermined rule.As shown in FIG. 6, in a block of a dot pattern which representsinformation, 5×5 reference grid point dots 4 are arranged with referenceto a key dot 2, and an information dot 3 is arranged around a virtualgrid point which is at the center surrounded by the four reference gridpoint dots 4. Arbitrary numerical information is defined in this block.The illustrative example of FIG. 6 shows a case where four blocks of adot pattern 1 are arranged in parallel (in bold frame), provided,however, that the dot pattern 1 is not limited to four blocks.

When a camera retrieves this dot pattern 1 as image data, reference gridpoint dots 4 can calibrate a distortion of a lens of the camera, skewedimaging, expansion and contraction of a paper surface, curved mediumsurface and distortion during printing. Specifically, a function forcalibration (Xn, Yn)=f(Xn′, Yn′) is calculated for converting distortedfour reference grid points 4 into the original square, then the vectorof the correct information dot 3 is calculated by calibrating aninformation dot 3 by the same function.

If reference grid point dots 4 are arranged in a dot pattern 1, sinceimage data of the dot pattern 1 retrieved by a camera can be calibratedits distortion attributable to the camera, image data of the dot pattern1 can be accurately recognized even when the image data is retrieved bya popular camera with a lens of high distortion rate. Moreover, evenwhen the dot pattern 1 is read out by a camera inclined with referenceto a surface of the dot pattern 1, the dot pattern 1 can be accuratelyrecognized.

Key dots 2 are dots, as shown in FIG. 6, arranged by shifting fourreference grid point dots 4 that are located at the four corners of ablock, in a certain direction. The key dot 2 is a representative pointof a block of a dot patient 1 which represents an information dot 3. Forexample, the key dots are dots obtained by shifting reference grid pointdots 4 that are located at the four corners of a block of a dot pattern1 by 0.1 mm upward. However these numbers are not limited to these, andmay vary depending on the size of a block of a dot pattern 1.

Information dots 3 are dots used for recognition of a variety ofinformation. The information dot 3 is arranged around a key dot 2 as arepresentative point, as well as at the ending point of a vectorexpressed with a starting point being a virtual grid point 5 that is atthe center surrounded by four reference grid point dots 4. For example,the information dot 3 is surrounded by reference grid point dots 4 and,as shown in FIG. 7A, since the dot 0.1 mm apart from the reference gridpoint 5 has direction and length when expressed as a vector, theinformation dots 3 expresses 3 bits by being disposed in eightdirections by being rotated by 45 degrees each in clockwise direction.As a result, one block of a dot pattern 1 can express 3 bits×16=48 bits.

FIG. 7B is a method for defining an information dot 3 having 2 bits oreach grid, in a dot pattern of FIG. 6. Each grid defines information of2 bits by shifting a dot in + direction and × direction. In this way,although 48 bits information can be defined indeed, data can beallocated to each 32 bits by dividing for an intended purpose. Maximumof 216 (approximately 65,000) patterns of dot pattern formats can berealized depending on the combination of + direction and × direction.

It should be noted that arrangement is not limited to this and may varyincluding a possibility of 4 bit expression by arranging dots in 16directions.

Preferably, the dot diameter of a key dot 2, information dot 3, orreference grid point dot 4 is approximately 0.05 mm in consideration ofviewing quality, printing accuracy in respect of a paper property,resolution of a camera, and optimal digitization.

Also, the gap between reference grid point dots 4 is preferablyapproximately 0.5 mm in both vertical and horizontal directions inconsideration of information amount required for an imaging area andpossible false recognition of dots 2, 3, and 4. In consideration offalse recognition of reference grid point dots 4 and information dots 3,disalignment of a key dot 2 is preferably around 20% of the grid gap.

The gap between the information dot 3 and a virtual grid point that issurrounded by four reference grid point dots 4 is preferably the gapapproximately 15 to 30% of a distance between adjacent virtual gridpoints 5. If the distance between an information dot 3 and a virtualgrid point 5 is shorter than this gap, dots are easily recognized as abig cluster, degrading the visual quality as a dot pattern 1. On theother hand, if the distance between an information dot 3 and a virtualgrid point 5 is longer than this gap, the judgment as to which one ofthe adjacent virtual grid point 5 is the center of a vector of theinformation dot 3 becomes difficult.

As shown in FIG. 6, one dot pattern is a dot pattern composed of 4×4block regions, and an information dot 3 of 2 bits is disposed in eachblock. The dot-code format of this information dot 3 is shown in FIG. 8.

As shown in FIG. 8, one dot pattern registers a parity check, a codevalue, an X coordinate, and a Y coordinate.

FIG. 9 is an example of information dot 3 and bit expression of the datadefined therein, and shows another embodiment.

Information dots 3 can express 4 bits if two types of information dots,long and short distance ones from a virtual grid point 5 that issurrounded by reference grid point dots 4, are used, and vectordirections are eight directions. Here, the long distance of theinformation dots 3 is preferably approximately 25 to 30% of the distancebetween adjacent virtual grid points 5, and the short distance,approximately 15 to 20%. However, the gap between the centers of thelong and short distance information dots 3 is preferably longer than thediameters of these dots.

The information dot 3 surrounded by four reference grid point dots 4 ispreferably one dot in consideration of visual quality. However, if thevisual quality is disregarded and information amount is required to belarge, one bit can be allocated to each vector and information dot 3 canbe expressed by a plurality of dots thereby expressing a great amount ofinformation. For example, with vectors of 8 concentric directions, aninformation dot 3 surrounded by four grid dots 4 can express 28 piecesof information 16 information dots in one block accounts for 2128 piecesof information.

FIGS. 10A to 10C are examples of information dots and bit expressions ofdata defined therein. FIG. 10A is a diagram disposing two dots; FIG. 10Bis a diagram disposing four dots; and FIG. 10C is a diagram disposingfive dots.

FIGS. 11A to 11D show modification examples of a dot pattern. FIG. 11Ais a schematic diagram of six information dot arrangement. FIG. 11B is aschematic diagram of nine information dot arrangement; FIG. 11C is aschematic diagram of 12 information dot arrangement, and FIG. 11D is aschematic diagram of 36 information dot arrangement.

The dot pattern 1 shown in FIG. 6 shows an example where 16 (4×4)information dots 3 are arranged in one block. However, this informationdot 3 is not limited to disposing of 16 dots and may vary. For example,depending on the required information size and the resolution of acamera, 6 (2×3) information dots 3 may be arranged in one block (FIG.11A), 9 (3×3) information dots 3 may be arranged in one block (FIG.11B), 12 (3×4) information dots 3 may be arranged in one block (FIG.11C), and 36 information dots 3 may be arranged in one block (FIG. 11D).

<Description of a Dot Pattern; Direction Dot>

Next, another embodiment of a dot pattern, a direction dot, is describedwith reference to FIGS. 12A to 12C.

This dot pattern defines the dot pattern's direction by the shape of itsblock. In FIG. 12A, reference points 48 a to 48 e are first arranged,and the line which connects these reference points 48 a to 48 e definesa shape showing the direction of the block (a pentagon oriented upwardin this example). Based on these reference points, virtual referencepoints 48 f, 48 g, and 48 h are arranged. An information dot 3 isdisposed at the ending point of a vector which has a length and adirection when having the virtual reference point as the starting point.In this way, the direction of a block can be defined by how referencepoints are arranged, in FIG. 11A. In addition, the whole size of a blockis also defined by the direction dot defining the orientation of theblock.

It should be noted that although the reference points 48 a to 48 e andinformation dot 3 were described as being the same shapes in FIG. 12A,reference points 48 a to 48 e may be larger than an information dot 3.Further, these reference points 48 a to 48 e ma take any shapesincluding an triangle, a square, or other polygons, as long as they canbe distinguished from an information dot 3.

FIG. 12B defines information according to the fact whether or not ainformation dot exists on a virtual grid point of a block.

In FIG. 12C, two of the block shown in FIG. 12A are coupled, inhorizontal and vertical directions respectively.

FIGS. 13A to 18 are diagrams illustrating another embodiment of theinvention. This embodiment uses the grid sheet by placing the sheet on aprint.

FIGS. 13A and 13B are diagrams showing a case using a grid sheet printedwith a dot pattern only on one side.

A user uses the grid sheet by covering a print, such as a book, amagazine, and a new paper, with the grid sheet. The user should use thesheet with the front side facing upward, whether using the sheet for thepage at the user's right as shown in FIG. 13A, or using the sheet forthe page at the use's left as shown in FIG. 13B.

FIG. 14A is a front view showing the front side of a grid sheet. Thegrid sheet is printed with a dot pattern signifying XY coordinate overthe entire surface. In the bottom of the grid sheet, icons indicatingnumbers from zero to nine and texts of “Page Input,” “Enter,” and“Cancel,” are superimposed and printed with dot patterns signifying codevalues. These icons are icons for inputting indexes that specify printsby a scanner.

FIG. 14B is a longitudinal sectional view of the grid sheet. This gridsheet is composed of layers of a transparent sheet for protection, atransparent infrared diffuse reflection layer, a dot pattern+graphicprint layer, and a transparent sheet for protection in the order fromthe rear side. Here, the graphic print layer is a visible print layer.

FIGS. 15A and 15B are diagrams showing a case using a grid sheet printedwith dot patterns on both sides. In this case, the grid sheet can beused while the sheet is being inserted between pages. That is, whenusing the grid sheet for the right page, a user places the grid sheet onthe right page as shown in FIG. 15A, then the surface printed with iconson the right side faces upward. Next, when using the grid sheet for theleft page, turns the page while keeping the grid sheet being insertedbetween pages as shown in FIG. 15B, then the surface printed with iconson the left side faces upward. It should be noted that the icons areprinted on both sides with ink.

FIG. 16 is a front view showing the front side of a grid sheet, and FIG.16B is a front view showing the rear side of the grid sheet. The frontside of the grid sheet is printed with a dot pattern signifying XYcoordinates over almost the entire surface, and icons indicating numbersfrom zero to nine and texts of “Page Input,” “Enter,” and “Cancel” aresuperimposed and printed with dot patterns signifying code values on theright part. These icons are icons for inputting indexes that specifyprints by a scanner. The rear side of the grid sheet is printed with adot pattern signifying XY coordinates over almost the entire surface,and icons and dot patterns same as the ones on front side aresuperimposed and printed on the left part.

FIG. 16C is a sectional view of a grid sheet. This grid sheet iscomposed of layers of a transparent sheet for protection, a dotpattern+graphic print sheet, an infrared diffuse reflection layer, a dotpattern+graphic print layer, and a transparent sheet for protection inthe order from the rear side.

FIGS. 17A to 17C are diagrams showing a system for displayinginformation on a display unit by a touch on the grid sheet by a user.

As shown in FIG. 17A, a user covers a print with a grid sheet andtouches the grid sheet with a scanner. The central processing unit (CPU)inside the scanner analyzes the dot pattern, converts into a coordinatevalue or/and a code value, and transmits to a personal computer througha USB cable. It should be noted that the central processing unit insidethe personal computer may be used instead to analyze and convert the dotpattern into the coordinate value or/and the code value.

The coordinate value means the value of an XY coordinate in a dotcoordinate system. Also, the code value of an index that specifies aprint paper surface a page, a title) that is input by touching an iconprinted on the grid sheet or the code value of an index that is inputusing a keyboard, means, for example, a page number of the print papersurface. Here, it is assumed that page n is specified. If a mask thatspecifies print information including a text, an illustration, and aphotograph, by means of an XY coordinate value, and multimediainformation corresponding to the mask number are configured in advance,the central processing unit in the personal computer refers to a dotcoordinate-mask no correspondence table (FIG. 17B) stored in the harddisc, based on the XY coordinate value of a dot pattern read by thescanner. The table is provided for each page, and, in this embodiment,the dot coordinate-mask no, correspondence table of page n is referredto, then, the mask number of the touch position is detected. Forexample, if the cross part indicated in FIG. 17B is the touch position,mask number is one. Next, a page number-mask no-multimedia informationfile correspondence table, as shown in FIG. 17C, is referred to. Thetable registers a multimedia information file corresponding to a pagenumber and a mask number. For example, a Web address is registered formask 1 of page n, and a local drive and an execution file are registeredfor mask 2 of page n. From the table, multimedia informationcorresponding to a certain page number and mask number is searched andoutput. That is, as the page number is n and the mask number is 1, a Webpage of the registered Web address is displayed.

FIG. 18 is a diagram showing another embodiment of the system fordisplaying information on a display unit by a touch on a sheet by auser.

As an example, a case where a word “Tokyo” is touched on a printindicating “Tokyo” in the text is described by referring to FIG. 18.

As shown in FIG. 18, a user inputs an index that specifies a print papersurface by touching an icon printed on the grid sheet, or inputs anindex on a keyboard to specify a print paper surface. The user, then,covers a print with a grid sheet, and touches the dot pattern of thepart where “Tokyo” is indicated by the scanner. Accordingly, the centralprocessing unit (CPU) inside the scanner analyzes the dot pattern,converts into a coordinate value or/and a code value and a dot XYcoordinate, and transmits to a personal computer through a USB cable. Itshould be noted that the central processing unit inside the personalcomputer may instead be used to analyze and convert into the coordinatevalue or/and code value.

The central processing unit (CPU) of the personal computer converts theprint paper surface ID and the dot coordinate that were obtained fromthe above process into an xy coordinate of DTP (Desktop Publishing)layout (an xy coordinate in the DTP layout of the original data of theprint).

Next, the central processing unit (CPU) of the personal computeraccesses the document management server through a network (NW). Thedocument management server stores a DTP file corresponding to each printpaper surface. The central processing unit (CPU) retrieves the DTP filecorresponding to the print paper surface (e.g., ID=n) from the documentmanagement server. Then, in the DTP file of ID=n, DTP coordinates (xt,yt) closest to the touch position (x, y) is selected and “Tokyo” isspecified. The DTP coordinates (xt, yt) are coordinates at the centralposition of the text region. After searching the DTP coordinates, thecentral processing unit accesses the dictionary server and searches adata file indicating a specified text, illustration, photograph, and thelike. The dictionary server stores relevant information includingdescriptions, URLs, and multimedia information, corresponding to thedata file indicating the specified text, illustration, photograph, andthe like. The central processing unit (CPU) of the document managementserver searches “Tokyo” from the dictionary server based on the program,and automatically transmits the relevant information through the network(NW) to the personal computer. As a result, the description relating to“Tokyo” is output and displayed on the display unit of the personalcomputer.

In this way, just a touch with a scanner on a grid sheet covering aprint can display, on a screen, a detailed description of a text,illustration, photograph, and the like of a print.

Conventionally, a dot pattern is superimposed and printed with a text,illustration, a photograph, and the like on a print, and then a usertouches the print with a scanner, in order to output informationrelating to the touched text, etc. However, in this way, already printedmedia cannot be dealt with, and another medium should be printed. Withthe present invention, as a print is used with a sheet coveringtherewith, an existing print may also be dealt with. Also, one sheet maybe commonly used for a plurality of prints, which enhances convenience.

FIG. 19 is a drawing illustrating an embodiment in which a grid sheet isattached on a display unit, content-specific information touched with ascanner is recognized, and relevant information is automaticallysearched and output.

As an example, a case touching a word “Tokyo” displayed in a displayscreen is described with reference to FIG. 19.

As shown in FIG. 19, a grid sheet is attached on the display screen ofthe personal computer. A user touches the dot pattern of a partindicating “Tokyo” with a scanner. Then, the central processing unit(CPU) inside the scanner analyzes the dot pattern, converts into an XYcoordinate, and transmits to the personal computer through a USB cable.This XY coordinate is an XY coordinate value of the touch position in adot coordinate system. It should be noted that the central processingunit of the personal computer may instead be used to analyze and convertinto the coordinate value.

Next, the central processing unit (CPU) of the personal computeraccesses through a network (NW) a Web server of each content displayedon the display unit. Each content file is stored in the Web server. Thecentral processing unit retrieves a content file (HTML, XML, Flash file,etc.), and, for the retrieved content file, an XY coordinate value ofthe touch position in the dot coordinate system is converted into the xycoordinate value in the format information of the content, such as HTML,XML, or Flash.

It should be noted that if the displayed content file is in the personalcomputer, the central processing unit of the computer does not have toaccess the Web server to retrieve a content file.

Next, a coordinate value (xt, yt) of content-specific information for atext, illustration, and photograph, etc. displayed in the display unit,closest to the touch position coordinate value (x, y), is searched. Thecoordinate value (xt, yt) of the content-specific information is thecoordinates of the central position of the content-specific information.After recognizing the content-specific information, the centralprocessing unit of the personal computer searches the multimediainformation, such as sound information and image information,corresponding to the data file, etc indicating the recognized text,illustration, or photograph from database of the electric dictionary orin which corresponding multimedia information is set in advance. Thedictionary server stores content relating information such as adescription, URL, or multimedia information, corresponding to the datafile indicating a text, an illustration, or a photograph. The centralprocessing unit (CPU) searches “Tokyo” from the dictionary server andautomatically outputs the content relating information through a network(NW) to the personal computer. In this manner, descriptions relating to“Tokyo” are displayed on the display unit of the personal computer.

In this way, just placing a grid sheet on a display unit enablesdisplaying, on a screen, of detailed descriptions of a text,illustration, photograph, and the like on the display unit.

FIG. 20 is a longitudinal sectional view of a grid sheet used in such anembodiment. The grid sheet is composed of an adhesive layer, an infrareddiffuse reflection layer, a dot pattern+graphic print layer, and atransparent sheet for protection, in the order from the rear side.

FIG. 21 is a drawing describing a case where a grid sheet is used for afront projector system.

In this embodiment, the grid sheet is used by being attached on ascreen. The screen displays a predetermined image by projections from aprojector. The projector is connected to a personal computer or a moviedelivering system not shown in the drawing. When an arbitrary positionis touched using a scanner connected to the personal computer, the dotpattern of that position is read by the scanner and converted into acoordinate value in the personal computer. In the hard disc device ofthe personal computer or in the movie delivering server an index tablerelating the coordinate value to an instruction or address, etc. isreferred to, and accordingly, output of multimedia information orinstruction of an operation prescribed in the corresponding address isperformed.

FIG. 22 is an example using a panel for a rear projector. In thissystem, the rear projector projects a movie from behind.

The front side of the panel for the rear projector is attached with agrid sheet. The structure of the grid sheet is the same as the one shownin FIG. 20.

A predetermined image is displayed on the panel for the rear projectorby projection from the rear projector. The rear projector is connectedto a personal computer or a movie delivering system not shown in thedrawing. When an arbitrary position of the panel for the rear projectoris touched with a scanner connected to the personal computer, the dotpattern of the position is read by the scanner and convened into acoordinate value in the personal computer. In the hard disc of thepersonal computer or in the movie delivering server, an index tablerelating the coordinate value to an instruction or address, etc. isreferred to, and accordingly, output of multimedia information orinstruction of an operation prescribed in the corresponding address isperformed.

FIG. 23A is an example where a grid sheet is used with a mobile phone.The grid sheet is attached on the display unit of the mobile phone, andtouched by a wireless scanner or a scanner connected to the mobile phonethrough a cable. Then, the dot pattern of the position is read out bythe scanner and converted into a coordinate value in the scanner or inthe mobile phone. In the memory of the mobile phone or in the dot codemanagement server for mobile phones, an index table relating thecoordinate value to an instruction or address, etc. is stored. Thecentral processing unit in the mobile phone refers to the index tableand performs output of multimedia information or instruction ofoperation prescribed in the corresponding address.

FIG. 23B is an example using a grid sheet for a car navigation system.

As such, when using the grid sheet for a car navigation system, theconnection between the scanner and the car navigation system ispreferably conducted by means of wireless connection, such as byBluetooth. Also, the scanner may transmit data corresponding to the readdot pattern to a server through a mobile phone network by connectingwith the mobile phone.

Further, the car navigation system shown in FIG. 23B can be used with amap, such as a sightseeing guide printed with a dot pattern as a print.

FIGS. 24 to 25 are diagrams illustrating an embodiment using a gridsheet of the invention for a thin client system.

Thin client is a general term meaning a system in which a clientterminal used by a user has minimum functions and a server side managesresources such as application software and files.

As shown in FIG. 24, in this embodiment, a plurality of display unitsare connected to a server (information processing device) through anetwork. As a display unit, variable forms of display units withoutembedded CPUs may be used including a general television monitor and adisplay unit for a personal computer. The display screen of each displayunit is attached with an information input help sheet. The server andeach display unit are connected by a wired method, such as RDP, USB, andBNC (Bayonet Neil Concelman), or a wireless method. Also, the server andthe scanner are connected by a wired method or a wireless method.

If a user touches the dot pattern of the grid sheet with the scanner,the dot pattern of the position is read out by the scanner and convertedinto an XY coordinate value in the scanner. In the hard disc device ofthe server, an index table relating the XY coordinate value to aninstruction or address is stored. The central processing unit of theserver refers to the index table and performs output of multimediainformation or instruction of an operation prescribed in thecorresponding address.

In this way, attaching, a grid sheet on a display screen enables atouch-panel style input with a simple terminal system of only a displayunit.

It should be noted that the dot pattern may register code values as wellas XY coordinate values. The code values are for identifying eachdisplay. In this case, after reading a dot pattern, the scannertransmits a code value and an XY coordinate value to a server(information processing device). The server recognizes which displayunit the code value refers to, and recognizes a variety of multimediainformation and/or an operation instruction corresponding to eachdisplay unit and displays the output information on the display units.

Further, an XY coordinate value which uniquely identities a display unitmay be printed as a dot pattern. In this case, the sheet is printed withXY coordinates which are divided from a larger region, and the sheet isused selectively for each display. That is, an XY coordinate value isdifferent for each display unit. If the XY coordinate value read by thescanner is transmitted to the server (information processing unit), theserver identifies which display unit was manipulated based on the XYcoordinate value. Then, the server recognizes a variety of multimediainformation output and/or an operation instruction corresponding to eachdisplay unit and displays the output information on the display units.

Furthermore, a sticker printed with a dot pattern of a code value whichidentifies each display may be attached on the display unit, as shown inFIG. 25. A user touches a grid sheet after touching the sticker. Aserver identifies which display unit was manipulated based on the codevalue registered in the dot pattern of the sticker. Next, the serverrecognizes the touch position by the user based on the transmitted XYcoordinate value from the dot pattern of the grid sheet, recognizes avariety of multimedia information and/or operation instructioncorresponding to each display unit, and displays the output informationin the display unit. The sticker may be made from the same material usedfor a general papery adhesive sticker printed with a clot patternthereon or the grid sheet of the invention.

As such, using the thin client method enables provision of a system withlow cost, since variable forms of display units including a generaltelevision monitor without an embedded CPU and a display unit for apersonal computer may be used.

<Calibration>

FIGS. 26A to 29B are diagrams illustrating a calibration performed whenusing a grid sheet.

To output information accurately reflecting the instruction displayed onthe touch position when a user touches a display unit or a print,position relation between the coordinate system of the display unit orprint, and the coordinate system of a grid sheet needs to be matched. Tothis end, a calibration is performed for properly relating thecoordinate system of the display unit or print and the coordinate systemof the grid sheet.

FIGS. 26A to 27C are diagrams illustrating a case where a calibration isperformed on the display screen of a display unit.

FIGS. 26A to 26C are diagrams illustrating a case where calibrationmarks are provided for a grid sheet.

As shown in FIG. 26A, calibration marks are provided in the vicinity offour corners of one side of the grid sheet. It should be noted that thecalibration marks do not have to be provided in the vicinity of the fourcorners, and may be provided at two or more corners or at the center, orboth at two or more corners and the center.

As shown in FIG. 26B, a user moves a cursor to a calibration mark andleft-clicks a mouse. The central processing unit of a personal computerrecognizes the clicked position, then properly relates the coordinatesystem of the display unit and the coordinate system of the grid sheet.As such, calibration is performed.

In FIG. 26B, the calibration marks are formed on a detachabletransparent sticker. A user peels off a sticker as shown in FIG. 26Cafter the calibration is completed.

It should be noted that the calibration marks may be directly printed ona grid sheet as well as formed on the transparent sticker. Moreover, thecalibration marks may be provided on a grid sheet in a removable stateand removed from the grid sheet after calibration is completed.

FIGS. 27A to 27C are diagrams illustrating a case where the calibrationmarks are used for the display screen of a display unit.

As shown in FIG. 27A, calibration marks are displayed in the vicinity offour corners of the display unit. It should be noted that thecalibration marks do not have to be provided in the vicinity of the fourcorners, and may be provided at two or more corners or at the center, orboth at two or more corners and the center.

A user touches the positions indicating calibration marks on a gridsheet as shown in FIG. 27C. The scanner reads out the dot pattern on thegrid sheet and transmits to a personal computer. The central processingunit of the personal computer recognizes XY coordinates (X1, Y1) of thedot at the touch position based on the transmitted dot pattern, andperforms a calibration for properly relating the coordinate system ofthe display unit to the coordinate system of the grid sheet.

It should be noted that, after the calibration is completed, thecalibration marks will not be displayed.

FIGS. 28A to 29B are diagrams illustrating a case where a calibration isconducted for a print.

FIGS. 28A and 28B are diagrams illustrating a case where calibrationmarks are provided for both a print and a grid sheet for the print.

As shown in FIG. 28A, calibration marks are printed in the vicinity offour corners of the grid sheet and the print, respectively. It should benoted that the calibration marks do not necessarily be printed in thevicinity of the four corners, and may be printed on two or more corners.

A user matches both calibration marks and covers the prim with the gridsheet. In this way, a calibration is performed for properly relating thecoordinate system of the print and the coordinate system of the gridsheet.

FIGS. 29A and 29B are diagrams illustrating a case where calibrationmarks are printed only on a print.

As shown in FIG. 29A, calibration marks are printed in the vicinity offour corners of the print. It should be noted that the calibration marksdo not necessarily be printed in the vicinity of the four corners, andmay be printed on two or more corners. A user covers the print with thegrid sheet and adjusts the scanner to the marks. The scanner reads thedot pattern on the grid sheet, and transmits to a personal computer. Thecentral processing unit of the personal computer recognizes XYcoordinates (X1, Y1) of the touch position based on the transmitted dotpattern, and performs a calibration for properly relating the coordinatesystem of the print to the coordinate system of the grid sheet.

Conducting such a calibration enables matching of position relationbetween the coordinate position of the grid sheet and the image of thedisplay unit or the print, and as a result, output of informationcorresponding to the image or text touched by a user is accuratelyperformed.

It should be noted that, in each above-described embodiment, when usinga grid sheet on a display screen, etc other methods may be used,including hanging the grid sheet at the top of the display screen aswell as attaching the grid sheet with adhesive agent.

The invention may be used as a touch panel by attaching the sheet onscreens of a variety of displays including the ones for a personalcomputer, PDA, and bank ATM. Further, by covering a print with the sheetand outputting, on a screen, information relating to the informationindicated in the print, the invention may be used for dictionaries, mailorder catalogs, learning materials, and the like.

What is claimed is:
 1. An information input help sheet, on which isprovided a dot pattern which defines an XY coordinate value and/or acode value generated by a dot-code generating algorithm, comprising: aninfrared diffuse reflection layer which diffusely reflects infrared raysfrom one side and has a characteristic to transmit visible light; and adot pattern layer provided on the one side of the infrared diffusereflection layer and on which is printed the dot pattern comprising thedots formed with material having an infrared absorbing characteristic.2. The information input help sheet according to claim 1, wherein theinfrared diffuse reflection layer further has a characteristic not toreflect or transmit infrared rays from an opposite side of the one side.3. The information input help sheet according to claim 1, wherein thedot pattern layer is a first dot pattern layer; a second dot patternlayer is further provided on an opposite side of the one side; and theinfrared diffuse reflection layer has a characteristic to diffuselyreflect the infrared rays from the opposite side.
 4. The informationinput help sheet according to claim 1 wherein a protection layer thathas a characteristic to transmit infrared light and visible light isprovided on a further external surface of the dot pattern layer.
 5. Theinformation input help sheet according to claim 1, wherein the dotpattern layer is printed on an infrared diffuse reflection layer side ofa protection layer that has a characteristic to transmit infrared lightand visible light.
 6. The information input help sheet according toclaim 1 wherein the dot pattern layer or other layers are superimposedand printed with a graphic including a text, an illustration, and aphotograph with an ink made of infrared transmitting material orinfrared reflecting material.
 7. The information input help sheetaccording to claim 1 wherein an adhesion layer is provided on anopposite side of the one side of the infrared diffuse reflection layer.8. An information processing system using the information input helpsheet, comprising: the information input help sheet according to claim1; a display unit on which the information input help sheet is placedand information is displayed; a dot-pattern reading unit that reads thedot pattern on the information input help sheet; and an informationprocessing device that causes the display unit to display theinformation based on the dot pattern read out by the dot-pattern readingunit.
 9. The information processing system using the information inputhelp sheet according to claim 8, wherein the information processingdevice is a personal computer, a PDA, a television receiving set, afront or rear projector, a game machine, a karaoke machine, a mobilephone terminal, a POS terminal, an ATM, a KIOSK terminal, a carnavigation system, a pachinko, a watch, or a smart phone, and theinformation input help sheet is disposed, as a touch-panel style inputdevice, on a display screen of the display unit or a screen.
 10. Asystem for outputting content-related information using the informationinput help sheet comprising: the information input help sheet accordingto claim 1, of which the dot pattern is generated by making an XYcoordinate value or an XY coordinate value and a code value into apattern in accordance with a predetermined algorithm; a display unit onwhich the information input help sheet is placed and a content expressedas a text, an illustration, a photograph, and a movie is displayed; adot-pattern reading unit that reads the dot pattern on the informationinput help sheet; an analysis unit that analyzes the dot pattern at atouch position read out by the dot-pattern reading unit and converts thedot pattern to the XY coordinate value; an output unit that outputscontent-related information relating to the content displayed on thedisplay unit that is recognized by the XY coordinate value.
 11. Thesystem for outputting content-related information using the informationinput help sheet according to claim 10, further comprising: an acquiringunit that acquires a content file corresponding to the content displayedon the display unit; a converting unit that converts the XY coordinatevalue at the touch position to an XY coordinate in the content file; arecognizing unit that searches a coordinate value of content specificinformation nearest to the XY coordinate of the touch position, andrecognizes the content specific information; and a searching unit thatsearches content-related information relating to the content specificinformation, wherein the output unit outputs the content-relatedinformation searched by the searching unit.
 12. A system for outputtingprint-related information using an information input help sheet,comprising: the information input help sheet according to claim 1, ofwhich the dot pattern is generated by making an XY coordinate value oran XY coordinate value and a code value into a pattern in accordancewith a predetermined algorithm; a print on which the information inputhelp sheet is placed; a dot-pattern reading unit that reads the dotpattern on the information input help sheet; an analysis unit that thatanalyzes the dot pattern at a touch position read out by the dot-patternreading unit and converts the dot pattern to the XY coordinate value; anoutput unit that outputs print-related information relating to the printthat is recognized by the XY coordinate value.
 13. The system foroutputting print-related information according to claim 12, furthercomprising: a print identifying unit that acquires print-specificinformation for identifying the print; a converting unit that convertsthe XY coordinate value at the touch position and the print-specificinformation to an XY coordinate in print information; an acquiring unitthat acquires a print file of the print; a recognizing unit thatsearches the print information nearest to the XY coordinate of the touchposition in the print file, and recognizes the print information; and asearching unit that searches print-related information relating to theprint information, wherein the output unit outputs the print-relatedinformation searched by the searching unit.
 14. A system for outputtingprint-related information using the information input help sheetaccording to claim 12, wherein the information input help sheet isfurther printed with an icon on which a text and/or a drawing patternfor inputting the print-specific information using the dot-patternreading unit are superimposed and printed with the dot pattern.
 15. Theinformation input help sheet according to claim 1, wherein theinformation input help sheet is processed into a sticker shape, a cardshape, a bookmark shape or a sticky note shape.
 16. An informationprocessing system using information input help sheets, comprising: theinformation input help sheets, of which dot pattern is generated bymaking an XY coordinate value or an XY coordinate value and a code valueinto a pattern in accordance with a predetermined algorithm; a pluralityof display units, on which the information input help sheets are placed;a plurality of dot-pattern reading units that read the dot pattern onthe information input help sheets, analyze the dot pattern, and convertthe dot pattern into the XY coordinate value; and one or moreinformation processing devices each comprising: a receiving unit that isrespectively connected to the display units and the dot-pattern readingunits by a wired or wireless method and receives the XY coordinate valuetransmitted from the dot-pattern reading units; a storage unit thatstores a table where coordinate values of the information input helpsheets and information and/or operation instructions are associated; anda processing unit that refers to the table and instructs the displayunits to output information corresponding the XY coordinate value or toperform an operation corresponding to the XY coordinate value.
 17. Theinformation processing system according to claim 16 wherein: theinformation input help sheet is printed with an XY coordinate value aswell as a code value that identifies each display unit as a dot pattern;the dot-pattern reading units transmit the read code value and XYcoordinate value to the information processing devices; and theinformation processing devices identify the display unit by the receivedcode value, and instruct the display unit to output information and/orto perform an operation corresponding to the identified display unit.18. The information processing system according to claim 16 wherein: theinformation input help sheet is printed with an XY coordinate thatuniquely identifies each display unit; the dot-pattern reading unitstransmit the read XY coordinate value to the information processingdevices; and the information processing devices identify the displayunit by the received XY coordinate value and instruct the display unitto output information and/or to perform an operation corresponding tothe identified display unit.
 19. The information processing systemaccording to claim 16 wherein: a sticker printed with the dot pattern ofthe code value that identifies each display unit is attached on achassis of the display unit; the dot-pattern reading units transmit theread code value to the information processing devices; and theinformation processing devices identify the display unit by the receivedcode value and instruct the display unit to output information and/or toperform an operation corresponding to the identified display unit.